How to install packages not available on CRAN?

[JosiahParry]

I'd like to use litedown with webR but running webr::install("litedown") and webr::install("yihui/litedown") both fail saying the package cannot be found.

Any tips here? I suspect the best thing i can do is to build it as part of the {rwasm} build process and mount it.

https://github.com/yihui/litedown